You'll notice that the link you provided does not actually include an example of the usage you intended it to serve as a reference for. This is probably because the usage is nonstandard, which is probably why GP asked their question.

It's reasonable to assume that "x * 10E^(y)" was meant as a notation for "x * 10^(y)" = "xEy", but many mathematical notations are overloaded. I have no way of knowing whether GP was genuinely confused, or merely trying to point out the nonstandard usage, but I prefer to believe the former.